Possible Duplicate:
How to extract a node attribute from XML using PHP's DOM Parser
How do I extract an HTML tag value?
HTML:
<input type="hidden" name="text1" id="text1" value="need to get this">
PHP:
$homepage = file_get_contents('http://www.example.com');
$doc = new DOMDocument;
$doc->preserveWhiteSpace = false;
@$doc->loadHTML($homepage);
$xpath = new DOMXpath($doc);
$filtered = $xpath->query("//input[@name='text1']");
How do I get value to be “need to get this”?
Update:
I got it working and hope it will help others too. After above code I got the value by:
echo $filtered->item(0)->getAttribute('value');
XPath can do the job of getting the value attribute with $xpath->query("//input[@name='text1']/@value");. Then you can iterate over the node list of attribute nodes and access the $value property of each attribute node.
Answer：
Look this method of DOM
http://www.php.net/manual/en/domelement.getattribute.php
var array_result = arrray();
foreach (filtered as $key => $value){
$array_result[] = $value->getAttribute('ID');
}
Answer：
I’m not familiar with the PHP syntax for this, but to select the value attribute you would use the following xpath:
//input[@name='text1']/@value
However xpath doesn’t return strings, it returns nodes. You want the nodeValue of the node, so if PHP follows convention, that code would be:
$xpath->query("//input[@name='text1']/@value")->item(0).nodeValue;
For learning purposes, keep in mind you always check the nodeValue property. So if you wanted the name of the same element, you’d use:
$xpath->query("//input[@name]/@name")->item(0).nodeValue;
You’d probably like to make sure the query returns a non-null value before querying the nodeValue property as well.
Tags: phpphp
